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The Scintigraphic Definition of Pulmonary Embolism

The Scintigraphic Definition of Pulmonary Embolism Pulmonary scintigrams were analyzed in conjunction with matched pulmonary angiograms for perfusion patterns, relation of perfusion to ventilation, and changes, with time, in the perfusion pattern. Eighty percent of the patients with lobar defects seen on scan and 30% with segmental or subsegmental defects had angiographic evidence of pulmonary embolism. Patients with lobar defects and pulmonary embolism had a lower incidence of findings on chest roentgenograms than did the other groups. Of the 20 patients with mismatched abnormalities of perfusion and ventilation, 19 had pulmonary emboli; none of the five patients with matched perfusion and ventilation had emboli. A rapidly changing perfusion pattern was found in ten patients with acute pulmonary embolism while a fixed pattern was found in five patients who did not have emboli. The data indicate that a large perfusion defect and a ventilation-perfusion mismatch correlate strongly with pulmonary embolism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png JAMA American Medical Association

The Scintigraphic Definition of Pulmonary Embolism

McNeil, Barbara J.; Holman, B. Leonard; Adelstein, S. James
JAMA , Volume 227 (7) – Feb 18, 1974
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References (20)

Publisher
American Medical Association
Copyright
Copyright © 1974 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.
ISSN
0098-7484
eISSN
1538-3598
DOI
10.1001/jama.1974.03230200011002
Publisher site
See Article on Publisher Site

Abstract

Pulmonary scintigrams were analyzed in conjunction with matched pulmonary angiograms for perfusion patterns, relation of perfusion to ventilation, and changes, with time, in the perfusion pattern. Eighty percent of the patients with lobar defects seen on scan and 30% with segmental or subsegmental defects had angiographic evidence of pulmonary embolism. Patients with lobar defects and pulmonary embolism had a lower incidence of findings on chest roentgenograms than did the other groups. Of the 20 patients with mismatched abnormalities of perfusion and ventilation, 19 had pulmonary emboli; none of the five patients with matched perfusion and ventilation had emboli. A rapidly changing perfusion pattern was found in ten patients with acute pulmonary embolism while a fixed pattern was found in five patients who did not have emboli. The data indicate that a large perfusion defect and a ventilation-perfusion mismatch correlate strongly with pulmonary embolism.

Journal

JAMA – American Medical Association

Published: Feb 18, 1974

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